Abstract
By optimizing the gain configuration and length of the loop, a 90-tone
optical frequency comb (OFC) is successfully generated based on recirculating
frequency shifter structure. The peak-to-peak power fluctuation of the 90-tone OFC
is 4.26 dB and the tone-to-noise ratio is higher than 19.17 dB. To further analyze
the noise accumulation feature of the tones when travelling around the loop,
linewidth of the tones is measured by delayed self-heterodyne interferometer
structure. The result shows the linewidth of the tones deteriorates little during
the recirculating process, indicating that the generated OFC is an ideal
multi-wavelength source for high-speed communication systems.
© 2014 Chinese Optics Letters
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